THREAD SERIES DESIGNATOR | UNRF |
NOMINAL THREAD DIAMETER | 0.250 INCHES |
THREAD QUANTITY PER INCH | 28 |
THREAD CLASS | 3A |
THREAD DIRECTION | RIGHT-HAND |
THREAD LENGTH | 0.524 INCHES MINIMUM AND |
| 0.625 INCHES MAXIMUM |
FASTENER LENGTH | 0.595 INCHES MINIMUM AND |
| 0.625 INCHES MAXIMUM |
MATERIAL | IRON ALLOY 660 OVERALL |
MATERIAL DOCUMENT AND CLASSIFICATION | AMS5731 ASSN STD SINGLE MATERIAL RESPONSE OR |
| AMS5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
SURFACE TREATMENT | SILVER OVERALL |
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS2411 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
HARDNESS RATING | 33.0 ROCKWELL C MINIMUM AND |
| 42.0 ROCKWELL C MAXIMUM OVERALL |
MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
MINIMUM YIELD STRENGTH | 120000 POUNDS PER SQUARE INCH |
HEAD STYLE | FLAT CHAMFER |
HEAD DIAMETER | 0.365 INCHES MINIMUM AND |
| 0.375 INCHES MAXIMUM |
HEAD HEIGHT | 0.244 INCHES MINIMUM AND |
| 0.250 INCHES MAXIMUM |
INTERNAL DRIVE STYLE | HEXAGON |
WIDTH ACROSS FLATS | 0.188 INCHES MINIMUM AND |
| 0.190 INCHES MAXIMUM |
HOLE CONFIGURATION STYLE | ROUND INTERNAL HEXAGON |
HOLE TYPE | DRILLED |
HOLE QUANTITY | 6 |
HOLE DIAMETER | 0.044 INCHES MINIMUM AND |
| 0.050 INCHES MAXIMUM |
SPECIFICATION/STANDARD DATA | 80205-NAS1351 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
PRECIOUS MATERIAL | SILVER |
PRECIOUS MATERIAL AND LOCATION | OVERALL SILVER |